Kavli Affiliate: Chao-Lin Kuo
| First 5 Authors: A. Foster, A. Chokshi, P. A. R. Ade, Z. Ahmed, E. Anderes
| Summary:
The detection of satellite thermal emission at millimeter wavelengths is
presented using data from the 3rd-Generation receiver on the South Pole
Telescope (SPT-3G). This represents the first reported detection of thermal
emission from artificial satellites at millimeter wavelengths. Satellite
thermal emission is shown to be detectable at high signal-to-noise on
timescales as short as a few tens of milliseconds. An algorithm for downloading
orbital information and tracking known satellites given observer constraints
and time-ordered observatory pointing is described. Consequences for
cosmological surveys and short-duration transient searches are discussed,
revealing that the integrated thermal emission from all large satellites does
not contribute significantly to the SPT-3G survey intensity map. Measured
satellite positions are found to be discrepant from their two-line element
(TLE) derived ephemerides up to several arcminutes which may present a
difficulty in cross-checking or masking satellites from short-duration
transient searches.
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